Question

The girl is often seen    ____in the art room.

A. practice drawing    B. practised drawing

C. to practice drawing    D. practice to draw

Answer

C

【解析】句意：那个女孩经常被看到在那个美术室里练习画画。see sb. do sth.表示看见某人做某事，被动语态是sb. Be seen to do sth.表示被看到某人正在做某事；practice doing sth.表示练习做某事。根据题意，故选C。

点睛：see sb doing sth 看见某人做某事（其中一部分过程）如：
When I passed her room,I saw her cleaning her room.(看到一部分）
see sb do sth 看见某人做某事（全部过程或全过程持续时间很短）如：
I saw him pick an apple.(pick an apple持续时间很短）
I saw him go into the room(强调全部过程）
see sb do sth 改成被动为：sb be seen to do sth.